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Arada [10]
2 years ago
9

C equals 2 pi r​; Cequals62.8 ​(Circumference of a​ circle)

Mathematics
1 answer:
tatuchka [14]2 years ago
3 0

Answer:

about 10

Step-by-step explanation:

62.8 = 2 pi r/2

62.8/2 = pi r

31.4/pi = pi r/pi

about 10 = r

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How to simplify bracket five x squared plus three x minus two bracket plus bracket three x minus two x plus five bracket
Scilla [17]

Answer:

5x^2 + 4x + 3.

Step-by-step explanation:

While I'm a little confused on what is closed and open parenthesis/brackets, I think I understand what you mean. In (5x^2+3x-2)+(3x-2x+5), the brackets can simply be removed as there is no multiplication between them. This means we get 5x^2 + 3x - 2 + 3x - 2x + 5. Combining like variables, we get 5x^2 + 4x + 3.

6 0
2 years ago
Read 2 more answers
Red and grey bricks were used to build a decorative wall. The number of red bricks/number of grey bricks was 5/2. There were 140
Airida [17]
To find the number of red bricks used, you can create a part to part to whole ratio from the simple ratio of red to grey brick they give.

Then, use the total to create an equivalent ratio with the actual total number of bricks (140).

<u>5 red </u>    <u>100 red</u>
<u>2 grey</u> =  <u>40 grey</u>
7 total   140 total
<u>
</u>Each time, the simple ratio was multiplied by 20 to get the actual totals for each color.
<u>
</u>There were 100 red bricks used.<u>


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6 0
2 years ago
Andrew has $550 in a savings account that earns 5 % annually. How much will he earn in interest in 4 years?
Delvig [45]

$110

Step-by-step explanation:

formula= P×T×R ÷ 100

550×4×5÷100

55×4×5÷10

1100÷10

$110

6 0
3 years ago
The last question 4. Is 1.5 56ft PLZ HELP GOD BLESS U AND UR GRades
Contact [7]

Answer: First option.

Step-by-step explanation:

You know that the following function model the height "h" of the ball (in feet) after a time "t" (in seconds):

h=-16t^2+48t+8

Notice that it is a Quadratic function, therefore, it is a parabola.

Then, the x-coordinate of its vertex will give you the time in seconds in which the balll reaches its maximum height and the y-coordinate of the vertex will give you the ball's maximum height.

 You can find the x-coordinate of the vertex with this formula:

x=t=\frac{-b}{2a}

You can identify that:

a=-16\\b=48

Substituting values, you get:

x=t=\frac{-48}{2(-16)}=1.5

FInally, you must substiute this value into the Quadratic function and then evaluate in order to find the ball's maximum height.

This is:

 h=-16(1.5)^2+48(1.5)+8=44

5 0
3 years ago
A circular clock face has a radius of 3.5 inches. What is the area of the clock face? Round to the nearest tenth. Use 3.14 for p
gtnhenbr [62]
The area is about 316 in2
Step-by-step Divide 63 by π and by 2 to determine the radius of the clock. 63÷2÷π≈10. To find the area of the face of the clock multiply π by 102
4 0
2 years ago
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